PS Business Parks, Inc. to Present at REITWeek 2013

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News Release PS Business Parks, Inc. 701 Western Avenue Glendale, CA 91201-2349 www.psbusinessparks.com

For Release: Date: Contact:

Immediately May 28, 2013 Edward A. Stokx (818) 244-8080, Ext. 1649

PS Business Parks, Inc. to Present at REITWeek 2013: NAREIT’s Investor Forum GLENDALE, California—PS Business Parks, Inc. (NYSE:PSB) announced that Joseph D. Russell, Jr., President and Chief Executive Officer, will make a presentation at REITWeek 2013: NAREIT’s Investor Forum at the Hilton Chicago in the Willford “A” Room on Thursday, June 6, 2013, from 9:30 a.m. to 10:00 a.m. (EDT). The presentation will be webcast through the Company’s website at www.psbusinessparks.com. Company Information PS Business Parks, Inc., a member of the S&P SmallCap 600, is a self-advised and self-managed real estate investment trust (“REIT”) that acquires, develops, owns and operates commercial properties, primarily multi-tenant flex, office and industrial space. The Company defines “flex” space as buildings that are configured with a combination of office and warehouse space and can be designed to fit a number of uses (including office, assembly, showroom, laboratory, light manufacturing and warehouse space). As of March 31, 2013, the Company wholly owned 28.2 million rentable square feet with approximately 4,600 customers located in eight states, concentrated in California (11.1 million sq. ft.), Virginia (4.0 million sq. ft.), Florida (3.7 million sq. ft.), Texas (3.5 million sq. ft.), Maryland (2.4 million sq. ft.), Washington (1.5 million sq. ft.), Oregon (1.3 million sq. ft.) and Arizona (0.7 million sq. ft.). Additional information about PS Business Parks, Inc. is available on the Internet. The Company’s website is www.psbusinessparks.com. ###